// mixin: 混入的意思 在styles中主要是个函数，用于文本替换
clearDefault()
    appearance: none
    border: none
    outline: none

/* btn(color, border = false)
    padding: 5px 10px
    border-radius: 5px
    outline: none
    border: none
    cursor: pointer
    if (border == true)
        border: 1px solid color
    else
        background-color: color
        color: #fff

    primaryBtn()
        btn(rgb(252, 157, 154))

    primaryBorderBtn()
        btn(rgb(252, 157, 154), true) */